Which of the following is an oxidation-reduction reaction? Group of answer choices

NaI(aq) + AgNO3(aq) → AgI(s) + NaNO3(aq)

All of the above are oxidation-reduction reactions.

Mg(s) + 2 HCl(aq) → MgCl2(aq) + H2(g)

HCl(aq) + LiOH(aq) → LiCl(aq) + H2O(l)

Pb(C2H3O2)2(aq) + 2 NaCl(aq) → PbCl2(s) + 2 NaC2H3O2(aq)

try answer.com that works for me

with this one i know the answer in craters one reason i looked it up and i learned about it there is my evidence

listen, you cant how young you were.

"you didn't chose the stud life. the stud life chose you."

answer : third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol

explanation :

let us write down the given equations

equation 1 :

equation 2 :

equation 3 :

let us use hess's law to find out which 2 equations can be added to get the third equation.

let us reverse equation 2 and multiply it by 2. the new equation that we get is,

equation 4 :

let us add equation 1 & 4

the above equation is similar to equation 3 but has different value for dhrxn.

therefore third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol